GASTEROPODA OF THE LOWER GEEEN MAELS. 



31 



PAIiEONTOLOGlCAIi EQUIVALENTS OP THE NEW JERSEY GREEN 



MARLS. 



Of the 222 species of Lamellibrauchiates described in VoL i, 74 are 

 new species, and of the 190 species of Gasteropods 107 are therein described 

 for the first time; 70 of these new forms are Cretaceous and 37 are Eocene. 

 These new species of course are of no stratigraphic value at the present 

 time; further than their generic relations have weight. It will be seen, 

 however, from tables Nos. 3 and 4, that the New Jersey Lower Marls must 

 be equivalents of the Cretaceous beds found so extensively throughout the 

 Southern States, notwithstanding the great difference in their lithological 

 character, as so large a proportion of the species have been recognized as 

 common to one or more of those localities, 66 species of these classe? 

 being known from Alabama and other States, as shown in the list below. 



New Jersey fossils common to Alabama and — 



state. 



Tennessee 



Mississippi 



North Carolina 

 Texas 



Lamelli- 

 brauchiates. 



15 



18 

 11 



7 



Gastero- 

 pods. 



Cephalo- 

 pods. 



While of New Jersey fossils found in other States and not in Alabama 

 there are — 



state. 



Lamelli- 

 biauchiates. 



Tennessee 



Mississippi 



North Carolina 

 Texas 



Gastero- 

 pods. 



Cephalo- 

 pods. 



In all probability many more Grasteropods may prove common to New 

 Jersey and other States when the casts from those places shall have been 

 critically compared. It will be seen, therefore, that no reasonable question 

 can be entertained of the near equivalency of these beds. Nor can there 

 be any question as to the relationship existing between the Crosswicks 



